Pixelation on Glass

Hi i’m struggling to get realistic looking glass reflections when I render and there’s usually what looks like pixelation on the fished render, any ideas how to get realistic looking glass??

The File below shows what I mean



First guess would be that if you’re using the reflection/environment maps that come with Rhino, they’re fairly low resolution, so that in the case of larger, flatter surfaces like the glass that are only going to reflect a tiny bit of the environment you can actually see the pixels.

In this kind of rendering I usually prefer to have a very black card in front of the glass surface. In this way the glass looks more transparent. Maybe with a small with card to add some fake environmental reflection.